The corrosion resistance of stainless steel seamless pipes depends on the alloying elements contained in the steel. Chromium is the basic element of stainless steel corrosion resistance, when the steel containing chromium content of about 12%, chromium and corrosive medium oxygen role in the steel surface to form a thin layer of oxide film (since the passivation film) , Can prevent the steel matrix further corrosion.Secondary Galvanized Steel Coil in China
In addition to chromium, stainless steel seamless pipe commonly used alloy elements are nickel, molybdenum, titanium, niobium, copper, nitrogen, etc., to meet the various uses of stainless steel and performance requirements. Medium and small caliber of hot crude oil or fuel oil pipeline, in order to reduce the heat pipe to the soil, in the pipeline plus insulation and corrosion of the composite layer. Commonly used insulation materials are rigid polyurethane foam, suitable temperature is -185 ~ 95 ℃. The soft texture of this material, in order to improve its strength, in the insulation layer plus a layer of high-density polyethylene layer, forming a composite structure to prevent infiltration of groundwater into the insulation layer.AISI 1020 types of steel bar
In foreign countries already have a complete set of production technology, life has also been the people's attention, three-layer polyethylene coating (3pe) combines the excellent properties of both fused epoxy powder coating and extruded polyethylene coating, Combining the interfacial and chemical resistance properties of fused epoxy powder coatings with the mechanical protection properties of extruded polyethylene coatings results in significant improvements in individual properties.panel de malla de alambre soldado con autógena del refuerzo del acero de alta calidad del precio ba
Therefore, as a buried pipeline outer protective layer is very superior. According to the information, three-pe can make the life of buried pipe up to 50 years, at present, the international pipeline is considered outside the anti-corrosion technology. In our country, three pe have taken the lead in the oil and gas system has been applied. China has built the Shaanxi-Beijing natural gas pipeline and the reservoir pipeline transportation pipeline, the recent national key project of nearly 4,000 km west-east gas pipeline are used three layers of pe anti-corrosion coating. Our focus is to introduce new indoor and outdoor water distribution pipes and to introduce some of the past uses of some new performance enhancements.High carbon stainless steel plate EN 1.4125

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